Susan is on her way home in her car. she has driven 6 miles so far, which is two-thirds of the way home. what is the total length of her drive?

If two thirds is 6 miles, then one third should be half of that, or 3 miles. Since there are 3 thirds in a whole, the whole length of her drive is 3 x 3 = 9 miles.

answer is the third choice:

3x^5+4x^4+x^3+2x^2-10x-7=0

step-by-step explanation:

hello from mrbilldoesmath!

answer:

25x^2 + 90x + 84

discussion:

mn(x) = m(n(x)) = m( 5x + 9) =

(5x + 9)^2 + 3 =>

25x^2 + 90x + 9^2 + 3 =

25x^2 + 90x + 84                 (as 9^2 = 9*9 = 81)

which is the second choice

regards,  

mrb

p.s.   i'll be on vacation from friday, dec 22 to jan 2, 2019. have a great new year!